Rotary britsh



W. F. CONCANNON AND F. E. KIEFER.

ROTARY BRUSH. APPLICATION FILED MAY]. I9l8.

Patented May 27, I919.

INVENTORS 3 ATTORNEY WILLIAM E. CONCANI TON, OF BRIDGEPORT, ANDFREDERICK E. KIEFER,

or MILFORD,

CONNECTICUT.

ROTARY BRUSH.

Specification of Letters ratent. I

Application filed May 7-, 1918. Serial No. 233,003.

To allwhom it may concern:

Be it known that we, (1) WILLIAM. F. Corr.- CANNON and (2) FREDERICK E.Kmrnn, citizens ofthe United States, residing at (1) 21 Maiden Lane,Bridgeport, (2) 361 East Broadway, Milford, (1) county of Fairfield,State of Connecticut, (2) county of New Haven, State of Connecticut,have invented an Improvement in Rotary Brushes, of which the followin isa specification.

This invention re ates to the manufacture of rotary cleaning andpolishing brushes, and has for its object to provide a brush which shallberelatively simple and inexpensive to produce and of greatly increaseddurability, for the reason that our novel method of making greatlyreduces thestrain placed upon the tuft holding wire.

With these and other objects in view, we have devised a rotary brush,consisting of a body having a central hole leading in from the tip and aplurality of holes radiating from the central hole, and tufts ofbristles held in place by threading a single wire across the bodytransversely, and in and out through the holes, each loop of the wiregathering a bunch of bristles at their midlength drawing the bightthrough a tuft hole and into the central hole.

In the accompanying drawing formin a part of this specification, Figure1 is an e evation of our novel brush as finished;

Fig. 2, a longitudinal section of the body illustrating the method ofsetting the tufts of bristles;

Fig. 3, a transverse section on an enlarged scale on the line 33 in Fig.1, looking in the direction of the arrows; and

Fig. 4 is a detail view partly in section illustrating, in connectionwith Fig. 1, the final steps in the making of a brush.

1O denotes the body which is ordinarily made of wood, is provided with acentral hole 11, extending from the tip down below the lowest tuft ofbristles, and a plurality of tuft holes, indicated by 12. These tuftholes of course vary in size, arrangement, and closeness, depending uponspecial uses for which brushes are intended. In the present instance,for conveniencein illustration, we have shown a body having holes arraned both in longitudinal rows and in circu ar rows, there being an endtuft, a plurality of circular rows each containing six tufts, and anintermediate row containing four tufts the intermediate holes,

tuft in place but not to on the tip of the body between the end tuftand-the first full circular row of tufts. It should be understood,however, that any special arrangement of the tufts is wholly unimportantso concerned.

13- denotes the tufts, each tuft consisting of a suitable sized bunch ofbristles, doubledupon itself at its midlength, and 14: denotes a pieceof flexible wire of suflicient length'to complete a brush. 7

Having secured the body in convenient position, the first step settingthe tufts is to pass wire inward through the central hole and outthrough one of the lowest tuft holes and then wind it two or three timesabout the shank to temporarily secure it, as indicated at15 in Fig. 2.place, although it is not permanently set there until later, is the endtuft, which we have indicated by 16. The wire is passed across themidlength of the bunch of bristles comprising this tuft and out throughone of and then drawn tight enough to hold the set it permanently. Thewire is then passed over the midlength of another tuft of bristles, backthrough the same hole, across the central hole and out one of the, othertuft holes, but preferably not through the next hole on'either side. Thewire is then drawn up tightly, which pulls the bight through the tufthole and into the central hole. The operation is then repeated insetting a third tuft in the hole through which the wire has just beenpassed outward. The wire is passed over the midlength of the third bunchof bristles, back through the same hole and outward through a hole onthe opposite-side of the body and is then drawn up tightly to set thetuft. In the present instance, in setting he fifth tuft, that is thelast tuft in the inter- -mediate row of four tufts, the wire, afterbeing passed over the midlength of the tuft of bristles andback throughthe hole, will be passed downward obliquely and out through one of theholes in the next row below. In setting the last tuft in the next row,the wire when passed backward through the body will be inclined downwardobliquely again and out through a hole in the next row below. As alreadyexplained, however, no special arrangement of the tuft holes in the bodyis necessary, and there is far as the present invention is Patented May2'7, 1919. p I

The first tuft to be put in outward through the body from no specialrule to follow except that of convenience in setting the tufts. It willbe found more convenient, as Well as better in other ways, to pass thewire across the cen tral hole and out through some other than thecontiguous hole on either side, and also in passing the wire downwardobliquely and outward to pass it through the nearest convenient hole inpreference to skipping holes and then having to work backward.

.17 denotes a wire hole leading obliquely the bottom of central hole 11.At any convenient time, but ordinarily before setting a tuft in the lasthole, indicated by 18, (usually the hole through which the inner end ofthe wire was passed before winding about the shank). the inner end ofthe wire is unwound from the shank and pulled taut so as to set tuft l6firmly in place, and the end is then passed backward through 'hole 18and out through wire hole 17. The operative end of the wire will havebeen passed outward through hole 18 in setting next to the last tuft.This end of the wire is now passed over the midlength of the bunch ofbristles for the last tuft, indicated by 19, and is then passed backthrough hole 18 and outward through wire hole 17, and is then drawn tautto set the last tuft. The two ends of wire will then be secured in anyconvenient manner. A simple and perfectly satisfactory way is to drive around headed nail 20 into the shank, wind the two ends of wire two "orthree times place. After the wire has been tightened in setting the lasttuft it is relieved from practically all strain. This for the reasonthat the bight of each bunch of bristles is drawn entirely through atuft hole and into the longitudinal hole which places the strains of useupon the body and practically relieves the wire from strain. The resultis a durability and reliability of the brushes in use greatly in excessof any brushes heretofore known to the trade. As a final operation thetufts are trimmed to uniform length as in Fig. 1.

Having thus described our invention, we claim:

The method of making rotary brushes which consists in forming alongitudinal hole in a body and tuft holes intersecting the longitudinalhole, passing a wire through the longitudinal hole and securing theinner end, passing the wire outwar through a tuft hole, then over themidlength of bristles for a tuft, then backward through the tuft hole,across the longitudinal hole and outward through another tuft hole, thentightening the wire to draw the bight through the tuft hole and into thecentral hole, and repeating the operation to set a tuft in each tufthole.

In testimony whereof We afiix our signatures.

WILLIAM F. OONCANN ON. FREDERICK E. KIE-FEB.

about-it, and then set the nail tightly to

